I'm not a barefoot runner, but I am another mom who runs and I just want to say that it's changed my life in terms of feeling better, making time for myself, and having more energy for my kids! It's definitely worth working on until you get to the point where it's more enjoyable and becomes part of your routine. Even days that I don't look forward to running, or I cut my run a little short, I still get the runner's high and have a more positive outlook and ability to handle my day.
Also, if you have seven children, you're probably one of the most motivated, hard working people out there, so if anyone can reach your goals, it's you! (I have two boys and I think I'm done!)